Type-writing machine.



TYPE WRTING MGEINE.

mien 'fum MAY 4f 19u.

IN'VENTR:

Pated June 23, 1914.

@him

V034511181 nplloticn med August 22,

'a subjectjof the King of vEngland,.residing s chines,

.n."lyoenr,

OFFICE.

or vuicouvna, BnrrIsH comunale, CANADA, assrenon 'r'o junnnnwoon rrrnwnrrsa courant, 'or Yoan, my., .e conrom'rron or rrrn-.wazrmeiucm' v Spec'tdcation of netten Patent.'

ism, senil no. 516,457.. mvidca'gnatnn appuentioguea my 4,

Patented June 23, 1914.

1an. um. sumaA To allwlzomjt; may concern: Be it known that I, Cnsm'ms H. Vocnr.,

Vancouver, inthe county of Vancpuver, Province of British Columbia, Dominion of Canada, have invented certain new and usel Improvements in Type-Writing Maofwhich the following tion,

This invention relatesv to the line-spacing mechanism of 'typewrting machines,

Thisapplicatlon is a division of my copending application No. 578,457, filed August 22,1910.V

- A principal object of this invention 1s .to "f'ide'; simple rand ellcient means for intermittently rotating the platen; also to provide imp l line-s aclng movement of the platen...

f A urther object isto arrange the linespacing mechanlsmso that' it can be readily- .disconnected from the Iplaten andv held in an inoperative position when desired, to permit `:tree rotatlon'of the platen in either is carried b axle 36. -W

direction.4 l

I provide a pneumatic cylinder ony the carriage, vactuating a rod or rack which `rotates the line-space wheel and platen. An adjustahlestop regulates the movement of the platen. The pneumatic cylinder is swiveledfsothat lthe rod canbe' swung out of engagement with theline-s ace wheel to permit free rotation of the p aten. Means are providedV for holding, the mechanismconnected to or disconnected from tholine In the accompanying drawings, is a diagrammatic view .of my invention showing the pneumatic jcylinderdn Alongitudinal section.- Fig'. 2`is a 'plan illustrate inga sliding stop-- for' regulatingthe degree of movement of the'platem Fig. 3 is a .per-` spective of the stop. t

By means ofa.key.A,'a stem B is'depressed .through 'pm a'nd slot connection open a valve vC, and adm it air flexible hose D from a supply pipe E. This air lows'through` nipple'20 to which the hose D is'atteched, into a cylinder. 30,- forcing a prefegallgy hollow piston'32 outwardly',

so that'the inclined teeth 3 3* of'ithe rack 33 rotate a line-spaceratchet wheel 35,which en a compressible fluid, like is a specifica` sinon, the rack notch. l This 1, to withdraw it roved'` ,means for regulating the f Y lng with ykey A is released, it

`mitted byia pivot .screw'31 passing t Figure lv .a plate 46, which is of theplatellfand tends to hold the cylinder with the rack 33 engaging the ratchet around :the/.10o

the rack through I a a platen 53, 'and rigid'- on` .l lafter the piston 1s -r, is used, the hollow space in the piston' r'nlshesa lar clearance chamber 50 in whlch the iui can ex and and contract; and; thls serves to cushxonthepisten both agalnst sudden starting'and against sudden arrest, thus reducing any tendency-'to overl1ne-spacing mechanism. In the Fig. 2 po- 33y advances into a notch of a' stop 39, and is 'arrested that is, the bottom -of lthe gives atwoftooth Amovement of the rack and ratchet wheel. .The block 39 may be slid by means of handle 44, in a transverse groove 38 in the 'carriage frame completely from the path of the end of the vrack 33, and this will permit a three-tooth movement of the ratchet wheel, which is the maximummovef ment; or the block 39 may be pushed forward to present its full width vv1n the path of the rack, and the ratchet will then have 40 in the corner by the face 40,

-a' movement through onlyone tooth-space.4

.A spring 42, having a detent'41 coperat- 43 in the face of the stop, enables the sto to be held in an one of the three posi lons described. exi-the .pring F, and the air in the cylinderexhaustsat port G of the valve. The piston.' 32;is returned by a' spring 4 9-in the chamthe rack slideszback will `be slight `univa tion of therack and verthe ratchet, there xnovexnentor vibracylinder, which .is perroui, 1gl1v fixed to the c the saidjpxvot' screw being 'mounted carriage 1. A spring 47 presses against the points of anotch 4'8in the edge wheel, as shown Sin ;Fig.. 1; and this far-` rangement.. permits `the slight4 vibration of referred-"to above: The cylinder. the rack may be swung-jup pivot 31, to an elevatedidle position where 1t ywill be held vby the s` ring 47 'coperat-v ing with a. notch 45, simi ar to the notch 48. The piston 32 is prevented frein-coming completely out of the cylinder by a screw 105 -51 on l an arm .52 on the forward end of the cylinder. This screw is put in place 6o throw the platen by violent operation of theisraised byfits return 'ber 50 attached y'to t `e cylinder head 54. As

linder, 1 in`"thev inserted, and it .ebend he understood that this stop is fiarenough from the Anormal position of the piston to permit the rack 33 to advance through its threetooth line-space movementv .Haring thus described my invention, I claim i ,i

1. A typewriting machine having a platen and a ratchet wheel for rotating the same, in eohirmtion with a pneumatic` cylinder' and piston, a rack carried by said piston and engaging said ratchet wheel, and adjustable means tor limiting the extent of movement of said rack.

2. A typewriting machine having a .platen and a line-space wheel, a rod engaging said wheel, arpneumatic cylinder, a piston in said cylinder connected with said rod for advancing said rod to rotate Said wheehsaid )iston provided with a large clearance cl1alner for the purpose set forth, and movable stop in the path of said rod adapted to be held in different positions permitting a different degree of movement of said rod.

3. A' typewriting machine having a platen and a linespace Wheeha rod engaging said linespace wheel, a sto mounted to slide transverselyI to the en of said rod, and means for holdingr said stop in different positions," said stop having a form permitting a. different amount of movement of said rod in the different positions of said stop.

4.' A typewriting machine having a platen, a line-spacewheel therefor, a rod engaging id line-space wheel to rotate the same, n cans for advancing said rod to effeet the line-space movement, a block movable transversely in the path of the end of said rod and having a notch therein which may be held in alinement with said rod, means for holdin said stop with its full width in the pat of said rod to effect a more limited movement of said rod, and means for holding said stop completely withdrawn from the path of movement vof said rod to permit the maximum movement thereof. v A

5. A typewriting machine having a platen and a line-space Wheel for rotating the same, in combination with a pneumatic cylinder, a piston.` and a rod connected to the piston and engaging said line-space Wheel for rotating the same, said cylinder having a pivot permitting said rod to be swung out of engagement with said line-space Wheel.

6. A typewriting machine having a platen i and a line-space Wheehin combination with a pneumatic cylinder having an axis of rotation, a piston, and a rod connected to the piston to rotate said line-space wheel, and means for holdingsaid cylinder with saidrod disengaged from said linefspace wheel.

7. A typewn'ting machine having in combination a. platen, a line-space Wheel, a pivoted pneumatic cylinder, a iston, a rod connected to the piston an engaging said lincWspace wheel to rotate the same, and a. spring coperating with said c flindcr when rotated upon its pivot for hol( ing .said cylinder with said rod disengaged from said line-s )ace Wheel.

8. n a typewriting machine, the combination with a platen and a line-space wheel, of a pneumatic cylinder, a piston in said cylinder for driving said line-space wheel, a stop for arresting said piston to limit the linespacing movement, a pivot on whichv said cylinder may swing to cause the piston rod to clear said linespace wheel, a dctent holding said cylinder in said cleared position and a stop for limiting the movement oi said piston when free of said line-space wheel.

t). In a typewriting machine, a line-space mechanism having means for connection with a source ot pneumatic power for operating said mechanism, a cylinder forming part of said mechanism, a piston, a pivot on which said cylinder swings, and a spring for holding the cylinder in normal position.

10.111 a typcwriting machine the combination with a line-space Wheel, of ay rod for drivingsaid wheel, a plurality of teeth on said rod. for engaging said Wheel, a piston connected to said rod, and a swinging cyl inder containing said piston.

1]. 1n a typewriting machine, the combination with a platen, of mechanism for rotating the platen comprising a cylinder 'adapted to be connected with a source of pneumatic power, a piston, and a piston rod, a pivot on which said cylinder swings, and. a spring it'or yieldingly holding the cylinder either in or out of operative position.

l2. ln a typewritmg machine, the combination with a rotary platen and a toothed lint-space wheel, of a cylinder, a piston working therein, a. piston rod tangential to the line-space wheel and provided with a tooth or teeth to engage the teeth of said wheel and drive the platen; said cylinder pivotally mounted to permit the piston rod to be swung either into or out of position to cooperate with said wheel, and means to hold the cylinder in either of said positions.

13. In a typewriting machine, the combination with a rotary platen and a toothed line-'space wheel, of a cylinder, a piston Y working therein, a piston rod tangential to i the line-space wheel and provided with a` tooth or teeth to engage the teeth of .said wheel and drive the platen, and an adjustable stop extending into the path oi' the free end of the piston rod to variably limitthc throw ot said rod.

1l. ln a tvpew'riting machine having a platen and line-space wheel therefor having a rack, a pneumatic cylinder, a pieton therein. a rod extending from said piston toward said wheel and having' a fixed tooth in cngagemcnt with Said rack toy operate said of pneumatic ressure to said piston, the

a'pacity oi sai cylinder being suicient to impart a, cushioning iniiuence to the operative stroke given said rod by said piston, a spring to return said rod at the completion of its o rative stroke, and me enabling saidro to freeits toothv from said rack-on v the return stroke.

`15. A ypewriting machine having a platen an a line-space wheel therefor, in

combination with a rod having means en. gaging said wheel to rotate it 1n line-spacmg pneumatic means to operate said rod, means whereby. said rod may be moved into 15 and out of operative position, and a. spring to hold said rod in the position to which moved. 4

CHARLES H. VOGEL. Witnesses: Y

G. C. Woonwann, A. E. GALPoN. 

